Add audio preview generator.

Thread here: https://2dimensions.slack.com/archives/CLLCU09T6/p1707353939433169

The executable will return a non zero code with an error printed on stderr if there's a problem. If the exit code is 0 (success) the output will be JSON like this:

```
{"channels":2,"duration":192.49632263183594,"format":"mp3","sampleRate":44100,"size":8095932}
```

or:

```
{"channels":2,"duration":3.9996354579925537,"format":"wav","sampleRate":96000,"size":2303834}
```

Sample invocation:

```
rive_audio_preview_generator -s ~/Desktop/games_original.wav -d ~/Desktop/games_preview.mp3
```

Diffs=
e145f9348 Add audio preview generator. (#6580)

Co-authored-by: Luigi Rosso <luigi-rosso@users.noreply.github.com>

.rive_head

diff --git a/.rive_head b/.rive_head
index 72aa73a..c42f714 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-27ac9fcbbe57e46afa449852b369401b4b579411
+e145f9348ceb3a5cd56cd1005a0fda5f0a3e754e

premake5_v2.lua

diff --git a/premake5_v2.lua b/premake5_v2.lua
index a188aba..400bd6e 100644
--- a/premake5_v2.lua
+++ b/premake5_v2.lua
@@ -38,6 +38,11 @@
 
     flags({ 'FatalCompileWarnings' })
 
+    filter({ 'system:linux' })
+    do
+        defines({ 'MA_NO_RUNTIME_LINKING' })
+    end
+
     filter({ 'system:macosx' })
     do
         buildoptions({